[mirror_zfs.git] / include / sys / dsl_dataset.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
 * Copyright (c) 2013 Steven Hartland. All rights reserved.
 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
 */

#ifndef	_SYS_DSL_DATASET_H
#define	_SYS_DSL_DATASET_H

#include <sys/dmu.h>
#include <sys/spa.h>
#include <sys/txg.h>
#include <sys/zio.h>
#include <sys/bplist.h>
#include <sys/dsl_synctask.h>
#include <sys/zfs_context.h>
#include <sys/dsl_deadlist.h>
#include <sys/refcount.h>
#include <zfeature_common.h>

#ifdef	__cplusplus
extern "C" {
#endif

struct dsl_dataset;
struct dsl_dir;
struct dsl_pool;

#define	DS_FLAG_INCONSISTENT	(1ULL<<0)
#define	DS_IS_INCONSISTENT(ds)	\
	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)

/*
 * Do not allow this dataset to be promoted.
 */
#define	DS_FLAG_NOPROMOTE	(1ULL<<1)

/*
 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
 * refquota/refreservations).
 */
#define	DS_FLAG_UNIQUE_ACCURATE	(1ULL<<2)

/*
 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
 * on a dataset. This allows the dataset to be destroyed using 'zfs release'.
 */
#define	DS_FLAG_DEFER_DESTROY	(1ULL<<3)
#define	DS_IS_DEFER_DESTROY(ds)	\
	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)

/*
 * DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
 * They should be of the format <reverse-dns>:<field>.
 */

/*
 * This field's value is the object ID of a zap object which contains the
 * bookmarks of this dataset.  If it is present, then this dataset is counted
 * in the refcount of the SPA_FEATURES_BOOKMARKS feature.
 */
#define	DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"

/*
 * This field is present (with value=0) if this dataset may contain large
 * blocks (>128KB).  If it is present, then this dataset
 * is counted in the refcount of the SPA_FEATURE_LARGE_BLOCKS feature.
 */
#define	DS_FIELD_LARGE_BLOCKS "org.open-zfs:large_blocks"

/*
 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
 * name lookups should be performed case-insensitively.
 */
#define	DS_FLAG_CI_DATASET	(1ULL<<16)

#define	DS_CREATE_FLAG_NODIRTY	(1ULL<<24)

typedef struct dsl_dataset_phys {
	uint64_t ds_dir_obj;		/* DMU_OT_DSL_DIR */
	uint64_t ds_prev_snap_obj;	/* DMU_OT_DSL_DATASET */
	uint64_t ds_prev_snap_txg;
	uint64_t ds_next_snap_obj;	/* DMU_OT_DSL_DATASET */
	uint64_t ds_snapnames_zapobj;	/* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
	uint64_t ds_num_children;	/* clone/snap children; ==0 for head */
	uint64_t ds_creation_time;	/* seconds since 1970 */
	uint64_t ds_creation_txg;
	uint64_t ds_deadlist_obj;	/* DMU_OT_DEADLIST */
	/*
	 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
	 * include all blocks referenced by this dataset, including those
	 * shared with any other datasets.
	 */
	uint64_t ds_referenced_bytes;
	uint64_t ds_compressed_bytes;
	uint64_t ds_uncompressed_bytes;
	uint64_t ds_unique_bytes;	/* only relevant to snapshots */
	/*
	 * The ds_fsid_guid is a 56-bit ID that can change to avoid
	 * collisions.  The ds_guid is a 64-bit ID that will never
	 * change, so there is a small probability that it will collide.
	 */
	uint64_t ds_fsid_guid;
	uint64_t ds_guid;
	uint64_t ds_flags;		/* DS_FLAG_* */
	blkptr_t ds_bp;
	uint64_t ds_next_clones_obj;	/* DMU_OT_DSL_CLONES */
	uint64_t ds_props_obj;		/* DMU_OT_DSL_PROPS for snaps */
	uint64_t ds_userrefs_obj;	/* DMU_OT_USERREFS */
	uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
} dsl_dataset_phys_t;

typedef struct dsl_dataset {
	dmu_buf_user_t ds_dbu;

	/* Immutable: */
	struct dsl_dir *ds_dir;
	dmu_buf_t *ds_dbuf;
	uint64_t ds_object;
	uint64_t ds_fsid_guid;
	boolean_t ds_is_snapshot;

	/* only used in syncing context, only valid for non-snapshots: */
	struct dsl_dataset *ds_prev;
	uint64_t ds_bookmarks;  /* DMU_OTN_ZAP_METADATA */

	/* has internal locking: */
	dsl_deadlist_t ds_deadlist;
	bplist_t ds_pending_deadlist;

	/* protected by lock on pool's dp_dirty_datasets list */
	txg_node_t ds_dirty_link;
	list_node_t ds_synced_link;

	/*
	 * ds_phys->ds_<accounting> is also protected by ds_lock.
	 * Protected by ds_lock:
	 */
	kmutex_t ds_lock;
	objset_t *ds_objset;
	uint64_t ds_userrefs;
	void *ds_owner;

	/*
	 * Long holds prevent the ds from being destroyed; they allow the
	 * ds to remain held even after dropping the dp_config_rwlock.
	 * Owning counts as a long hold.  See the comments above
	 * dsl_pool_hold() for details.
	 */
	refcount_t ds_longholds;

	/* no locking; only for making guesses */
	uint64_t ds_trysnap_txg;

	/* for objset_open() */
	kmutex_t ds_opening_lock;

	uint64_t ds_reserved;	/* cached refreservation */
	uint64_t ds_quota;	/* cached refquota */

	kmutex_t ds_sendstream_lock;
	list_t ds_sendstreams;

	/* Protected by our dsl_dir's dd_lock */
	list_t ds_prop_cbs;

	/*
	 * For ZFEATURE_FLAG_PER_DATASET features, set if this dataset
	 * uses this feature.
	 */
	uint8_t ds_feature_inuse[SPA_FEATURES];

	/*
	 * Set if we need to activate the feature on this dataset this txg
	 * (used only in syncing context).
	 */
	uint8_t ds_feature_activation_needed[SPA_FEATURES];

	/* Protected by ds_lock; keep at end of struct for better locality */
	char ds_snapname[MAXNAMELEN];
} dsl_dataset_t;

static inline dsl_dataset_phys_t *
dsl_dataset_phys(dsl_dataset_t *ds)
{
	return (ds->ds_dbuf->db_data);
}

/*
 * The max length of a temporary tag prefix is the number of hex digits
 * required to express UINT64_MAX plus one for the hyphen.
 */
#define	MAX_TAG_PREFIX_LEN	17

#define	dsl_dataset_is_snapshot(ds) \
	(dsl_dataset_phys(ds)->ds_num_children != 0)

#define	DS_UNIQUE_IS_ACCURATE(ds)	\
	((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)

int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
    dsl_dataset_t **dsp);
boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds,
    void *tag);
int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag,
    dsl_dataset_t **);
void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
int dsl_dataset_own(struct dsl_pool *dp, const char *name,
    void *tag, dsl_dataset_t **dsp);
int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
    void *tag, dsl_dataset_t **dsp);
void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
void dsl_dataset_name(dsl_dataset_t *ds, char *name);
boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag);
uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
    dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
    uint64_t flags, dmu_tx_t *tx);
int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
int dsl_dataset_promote(const char *name, char *conflsnap);
int dsl_dataset_rename_snapshot(const char *fsname,
    const char *oldsnapname, const char *newsnapname, boolean_t recursive);
int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
    minor_t cleanup_minor, const char *htag);

blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);

spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);

boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
    dsl_dataset_t *snap);

void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx);

void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
    dmu_tx_t *tx);
int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
    dmu_tx_t *tx, boolean_t async);
boolean_t dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp,
    uint64_t blk_birth);
uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
    uint64_t *value);

void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
void dsl_dataset_space(dsl_dataset_t *ds,
    uint64_t *refdbytesp, uint64_t *availbytesp,
    uint64_t *usedobjsp, uint64_t *availobjsp);
uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);

int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);

int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
    uint64_t asize, uint64_t inflight, uint64_t *used,
    uint64_t *ref_rsrv);
int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
    uint64_t quota);
int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
    uint64_t reservation);

boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
    uint64_t earlier_txg);
void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);

int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
    dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx);
void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
    dsl_dataset_t *origin_head, dmu_tx_t *tx);
int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
    dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr);
void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
    dmu_tx_t *tx);

void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
    dmu_tx_t *tx);
void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
int dsl_dataset_get_snapname(dsl_dataset_t *ds);
int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
    uint64_t *value);
int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx,
    boolean_t adj_cnt);
void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
    zprop_source_t source, uint64_t value, dmu_tx_t *tx);
void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx);
int dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result);

void dsl_dataset_deactivate_feature(uint64_t dsobj,
    spa_feature_t f, dmu_tx_t *tx);

#ifdef ZFS_DEBUG
#define	dprintf_ds(ds, fmt, ...) do { \
	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
	char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
	dsl_dataset_name(ds, __ds_name); \
	dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
	kmem_free(__ds_name, MAXNAMELEN); \
	} \
_NOTE(CONSTCOND) } while (0)
#else
#define	dprintf_ds(dd, fmt, ...)
#endif

#ifdef	__cplusplus
}
#endif

#endif /* _SYS_DSL_DATASET_H */
Commit	Line	Data
34dc7c2f BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21	/*
428870ff	22	* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
241b5415	23	* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
fcff0f35	24	* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
95fd54a1	25	* Copyright (c) 2013 Steven Hartland. All rights reserved.
0c66c32d	26	* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
34dc7c2f BB	27	*/
	28
	29	#ifndef _SYS_DSL_DATASET_H
	30	#define _SYS_DSL_DATASET_H
	31
34dc7c2f BB	32	#include <sys/dmu.h>
	33	#include <sys/spa.h>
	34	#include <sys/txg.h>
	35	#include <sys/zio.h>
	36	#include <sys/bplist.h>
	37	#include <sys/dsl_synctask.h>
	38	#include <sys/zfs_context.h>
428870ff	39	#include <sys/dsl_deadlist.h>
13fe0198	40	#include <sys/refcount.h>
241b5415	41	#include <zfeature_common.h>
34dc7c2f BB	42
	43	#ifdef __cplusplus
	44	extern "C" {
	45	#endif
	46
	47	struct dsl_dataset;
	48	struct dsl_dir;
	49	struct dsl_pool;
	50
34dc7c2f	51	#define DS_FLAG_INCONSISTENT (1ULL<<0)
b128c09f	52	#define DS_IS_INCONSISTENT(ds) \
d683ddbb	53	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)
fa86b5db	54
34dc7c2f	55	/*
fa86b5db	56	* Do not allow this dataset to be promoted.
34dc7c2f BB	57	*/
	58	#define DS_FLAG_NOPROMOTE (1ULL<<1)
	59
	60	/*
	61	* DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
	62	* calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
	63	* refquota/refreservations).
	64	*/
	65	#define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
	66
45d1cae3 BB	67	/*
	68	* DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
	69	* on a dataset. This allows the dataset to be destroyed using 'zfs release'.
	70	*/
	71	#define DS_FLAG_DEFER_DESTROY (1ULL<<3)
	72	#define DS_IS_DEFER_DESTROY(ds) \
d683ddbb	73	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)
45d1cae3	74
fa86b5db MA	75	/*
	76	* DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
	77	* They should be of the format <reverse-dns>:<field>.
	78	*/
	79
da536844 MA	80	/*
	81	* This field's value is the object ID of a zap object which contains the
	82	* bookmarks of this dataset. If it is present, then this dataset is counted
	83	* in the refcount of the SPA_FEATURES_BOOKMARKS feature.
	84	*/
	85	#define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"
	86
f1512ee6 MA	87	/*
	88	* This field is present (with value=0) if this dataset may contain large
	89	* blocks (>128KB). If it is present, then this dataset
	90	* is counted in the refcount of the SPA_FEATURE_LARGE_BLOCKS feature.
	91	*/
	92	#define DS_FIELD_LARGE_BLOCKS "org.open-zfs:large_blocks"
	93
34dc7c2f BB	94	/*
	95	* DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
	96	* name lookups should be performed case-insensitively.
	97	*/
	98	#define DS_FLAG_CI_DATASET (1ULL<<16)
	99
13fe0198 MA	100	#define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
13fe0198 MA	101
34dc7c2f	102	typedef struct dsl_dataset_phys {
b128c09f BB	103	uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
b128c09f BB	104	uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
34dc7c2f	105	uint64_t ds_prev_snap_txg;
b128c09f BB	106	uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
b128c09f BB	107	uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
34dc7c2f BB	108	uint64_t ds_num_children; /* clone/snap children; ==0 for head */
	109	uint64_t ds_creation_time; /* seconds since 1970 */
	110	uint64_t ds_creation_txg;
428870ff	111	uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
9ae529ec CS	112	/*
	113	* ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
	114	* include all blocks referenced by this dataset, including those
	115	* shared with any other datasets.
	116	*/
	117	uint64_t ds_referenced_bytes;
34dc7c2f BB	118	uint64_t ds_compressed_bytes;
	119	uint64_t ds_uncompressed_bytes;
	120	uint64_t ds_unique_bytes; /* only relevant to snapshots */
	121	/*
	122	* The ds_fsid_guid is a 56-bit ID that can change to avoid
	123	* collisions. The ds_guid is a 64-bit ID that will never
	124	* change, so there is a small probability that it will collide.
	125	*/
	126	uint64_t ds_fsid_guid;
	127	uint64_t ds_guid;
b128c09f	128	uint64_t ds_flags; /* DS_FLAG_* */
34dc7c2f	129	blkptr_t ds_bp;
b128c09f BB	130	uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
b128c09f BB	131	uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
45d1cae3 BB	132	uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
45d1cae3 BB	133	uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
34dc7c2f BB	134	} dsl_dataset_phys_t;
	135
	136	typedef struct dsl_dataset {
0c66c32d JG	137	dmu_buf_user_t ds_dbu;
0c66c32d JG	138
34dc7c2f BB	139	/* Immutable: */
34dc7c2f BB	140	struct dsl_dir *ds_dir;
34dc7c2f BB	141	dmu_buf_t *ds_dbuf;
	142	uint64_t ds_object;
	143	uint64_t ds_fsid_guid;
0c66c32d	144	boolean_t ds_is_snapshot;
34dc7c2f	145
b128c09f BB	146	/* only used in syncing context, only valid for non-snapshots: */
b128c09f BB	147	struct dsl_dataset *ds_prev;
da536844	148	uint64_t ds_bookmarks; /* DMU_OTN_ZAP_METADATA */
34dc7c2f BB	149
34dc7c2f BB	150	/* has internal locking: */
428870ff BB	151	dsl_deadlist_t ds_deadlist;
428870ff BB	152	bplist_t ds_pending_deadlist;
34dc7c2f BB	153
	154	/* protected by lock on pool's dp_dirty_datasets list */
	155	txg_node_t ds_dirty_link;
	156	list_node_t ds_synced_link;
	157
	158	/*
	159	* ds_phys->ds_<accounting> is also protected by ds_lock.
	160	* Protected by ds_lock:
	161	*/
	162	kmutex_t ds_lock;
428870ff	163	objset_t *ds_objset;
45d1cae3	164	uint64_t ds_userrefs;
13fe0198	165	void *ds_owner;
b128c09f BB	166
b128c09f BB	167	/*
13fe0198 MA	168	* Long holds prevent the ds from being destroyed; they allow the
	169	* ds to remain held even after dropping the dp_config_rwlock.
	170	* Owning counts as a long hold. See the comments above
	171	* dsl_pool_hold() for details.
b128c09f	172	*/
13fe0198	173	refcount_t ds_longholds;
34dc7c2f BB	174
	175	/* no locking; only for making guesses */
	176	uint64_t ds_trysnap_txg;
	177
	178	/* for objset_open() */
	179	kmutex_t ds_opening_lock;
	180
	181	uint64_t ds_reserved; /* cached refreservation */
	182	uint64_t ds_quota; /* cached refquota */
	183
37abac6d BP	184	kmutex_t ds_sendstream_lock;
	185	list_t ds_sendstreams;
	186
0eb21616 JG	187	/* Protected by our dsl_dir's dd_lock */
	188	list_t ds_prop_cbs;
	189
241b5415 MA	190	/*
	191	* For ZFEATURE_FLAG_PER_DATASET features, set if this dataset
	192	* uses this feature.
	193	*/
	194	uint8_t ds_feature_inuse[SPA_FEATURES];
	195
	196	/*
	197	* Set if we need to activate the feature on this dataset this txg
	198	* (used only in syncing context).
	199	*/
	200	uint8_t ds_feature_activation_needed[SPA_FEATURES];
	201
34dc7c2f BB	202	/* Protected by ds_lock; keep at end of struct for better locality */
	203	char ds_snapname[MAXNAMELEN];
	204	} dsl_dataset_t;
	205
d683ddbb JG	206	static inline dsl_dataset_phys_t *
	207	dsl_dataset_phys(dsl_dataset_t *ds)
	208	{
	209	return (ds->ds_dbuf->db_data);
	210	}
	211
572e2857 BB	212	/*
	213	* The max length of a temporary tag prefix is the number of hex digits
	214	* required to express UINT64_MAX plus one for the hyphen.
	215	*/
	216	#define MAX_TAG_PREFIX_LEN 17
	217
5dc8b736 MG	218	#define dsl_dataset_is_snapshot(ds) \
	219	(dsl_dataset_phys(ds)->ds_num_children != 0)
	220
34dc7c2f	221	#define DS_UNIQUE_IS_ACCURATE(ds) \
d683ddbb	222	((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
34dc7c2f	223
13fe0198 MA	224	int dsl_dataset_hold(struct dsl_pool dp, const char name, void *tag,
13fe0198 MA	225	dsl_dataset_t **dsp);
6ebebace JG	226	boolean_t dsl_dataset_try_add_ref(struct dsl_pool dp, dsl_dataset_t ds,
6ebebace JG	227	void *tag);
13fe0198 MA	228	int dsl_dataset_hold_obj(struct dsl_pool dp, uint64_t dsobj, void tag,
	229	dsl_dataset_t **);
	230	void dsl_dataset_rele(dsl_dataset_t ds, void tag);
	231	int dsl_dataset_own(struct dsl_pool dp, const char name,
428870ff	232	void tag, dsl_dataset_t *dsp);
b128c09f	233	int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
13fe0198	234	void tag, dsl_dataset_t *dsp);
428870ff	235	void dsl_dataset_disown(dsl_dataset_t ds, void tag);
13fe0198 MA	236	void dsl_dataset_name(dsl_dataset_t ds, char name);
13fe0198 MA	237	boolean_t dsl_dataset_tryown(dsl_dataset_t ds, void tag);
b128c09f BB	238	uint64_t dsl_dataset_create_sync(dsl_dir_t pds, const char lastname,
	239	dsl_dataset_t origin, uint64_t flags, cred_t , dmu_tx_t *);
	240	uint64_t dsl_dataset_create_sync_dd(dsl_dir_t dd, dsl_dataset_t origin,
34dc7c2f	241	uint64_t flags, dmu_tx_t *tx);
13fe0198	242	int dsl_dataset_snapshot(nvlist_t snaps, nvlist_t props, nvlist_t *errors);
428870ff	243	int dsl_dataset_promote(const char name, char conflsnap);
13fe0198 MA	244	int dsl_dataset_rename_snapshot(const char *fsname,
	245	const char oldsnapname, const char newsnapname, boolean_t recursive);
	246	int dsl_dataset_snapshot_tmp(const char fsname, const char snapname,
	247	minor_t cleanup_minor, const char *htag);
34dc7c2f	248
34dc7c2f BB	249	blkptr_t dsl_dataset_get_blkptr(dsl_dataset_t ds);
	250	void dsl_dataset_set_blkptr(dsl_dataset_t ds, blkptr_t bp, dmu_tx_t *tx);
	251
	252	spa_t dsl_dataset_get_spa(dsl_dataset_t ds);
	253
19580676 MA	254	boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
19580676 MA	255	dsl_dataset_t *snap);
34dc7c2f BB	256
	257	void dsl_dataset_sync(dsl_dataset_t os, zio_t zio, dmu_tx_t *tx);
	258
428870ff	259	void dsl_dataset_block_born(dsl_dataset_t ds, const blkptr_t bp,
34dc7c2f	260	dmu_tx_t *tx);
428870ff BB	261	int dsl_dataset_block_kill(dsl_dataset_t ds, const blkptr_t bp,
	262	dmu_tx_t *tx, boolean_t async);
	263	boolean_t dsl_dataset_block_freeable(dsl_dataset_t ds, const blkptr_t bp,
	264	uint64_t blk_birth);
34dc7c2f	265	uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
6772fb67 BB	266	int dsl_dataset_snap_lookup(dsl_dataset_t ds, const char name,
6772fb67 BB	267	uint64_t *value);
34dc7c2f BB	268
	269	void dsl_dataset_dirty(dsl_dataset_t ds, dmu_tx_t tx);
	270	void dsl_dataset_stats(dsl_dataset_t os, nvlist_t nv);
	271	void dsl_dataset_fast_stat(dsl_dataset_t ds, dmu_objset_stats_t stat);
	272	void dsl_dataset_space(dsl_dataset_t *ds,
	273	uint64_t refdbytesp, uint64_t availbytesp,
	274	uint64_t usedobjsp, uint64_t availobjsp);
	275	uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
330d06f9 MA	276	int dsl_dataset_space_written(dsl_dataset_t oldsnap, dsl_dataset_t new,
	277	uint64_t usedp, uint64_t compp, uint64_t *uncompp);
	278	int dsl_dataset_space_wouldfree(dsl_dataset_t firstsnap, dsl_dataset_t last,
	279	uint64_t usedp, uint64_t compp, uint64_t *uncompp);
04434775	280	boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
34dc7c2f	281
34dc7c2f BB	282	int dsl_dsobj_to_dsname(char pname, uint64_t obj, char buf);
	283
	284	int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
	285	uint64_t asize, uint64_t inflight, uint64_t *used,
	286	uint64_t *ref_rsrv);
13fe0198	287	int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
428870ff	288	uint64_t quota);
13fe0198	289	int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
428870ff BB	290	uint64_t reservation);
428870ff BB	291
da536844 MA	292	boolean_t dsl_dataset_is_before(dsl_dataset_t later, dsl_dataset_t earlier,
da536844 MA	293	uint64_t earlier_txg);
13fe0198 MA	294	void dsl_dataset_long_hold(dsl_dataset_t ds, void tag);
	295	void dsl_dataset_long_rele(dsl_dataset_t ds, void tag);
	296	boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
	297
	298	int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
831baf06	299	dsl_dataset_t origin_head, boolean_t force, void owner, dmu_tx_t *tx);
13fe0198 MA	300	void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
	301	dsl_dataset_t origin_head, dmu_tx_t tx);
	302	int dsl_dataset_snapshot_check_impl(dsl_dataset_t ds, const char snapname,
788eb90c	303	dmu_tx_t tx, boolean_t recv, uint64_t cnt, cred_t cr);
13fe0198 MA	304	void dsl_dataset_snapshot_sync_impl(dsl_dataset_t ds, const char snapname,
	305	dmu_tx_t *tx);
	306
	307	void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
	308	dmu_tx_t *tx);
	309	void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
	310	int dsl_dataset_get_snapname(dsl_dataset_t *ds);
	311	int dsl_dataset_snap_lookup(dsl_dataset_t ds, const char name,
	312	uint64_t *value);
788eb90c JJ	313	int dsl_dataset_snap_remove(dsl_dataset_t ds, const char name, dmu_tx_t *tx,
788eb90c JJ	314	boolean_t adj_cnt);
13fe0198 MA	315	void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
13fe0198 MA	316	zprop_source_t source, uint64_t value, dmu_tx_t *tx);
da536844	317	void dsl_dataset_zapify(dsl_dataset_t ds, dmu_tx_t tx);
46ba1e59	318	int dsl_dataset_rollback(const char fsname, void owner, nvlist_t *result);
34dc7c2f	319
241b5415 MA	320	void dsl_dataset_deactivate_feature(uint64_t dsobj,
	321	spa_feature_t f, dmu_tx_t *tx);
	322
34dc7c2f BB	323	#ifdef ZFS_DEBUG
	324	#define dprintf_ds(ds, fmt, ...) do { \
	325	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
79c76d5b	326	char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
34dc7c2f BB	327	dsl_dataset_name(ds, __ds_name); \
	328	dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
	329	kmem_free(__ds_name, MAXNAMELEN); \
	330	} \
	331	_NOTE(CONSTCOND) } while (0)
	332	#else
	333	#define dprintf_ds(dd, fmt, ...)
	334	#endif
	335
	336	#ifdef __cplusplus
	337	}
	338	#endif
	339
	340	#endif /* _SYS_DSL_DATASET_H */